I need to know my aig number please for last year

Last year's agi number

Do you need it to efile 2018? If you filed 2017 late in the year try using 0 for the AGI to efile.

How to find your AGI
https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/00/25947

If it's the AGI number you're looking for, I believe it is on Line 37, of Form 1040.

Just adding for clarity that the AGI will be on Line 37, of Form 1040, from the prior year, so, if you're working on 2018, you will find your AGI on Line 37, of your 2017 Form 1040.

You can follow this FAQ to get your last years AGI. 

If you need additional assistance, please contact customer service by following this FAQ. 

Is there a fast way to get my 2018 AGI

I need it to efile my 2019 1040, I cant fine the 2018 filing

I can not fine my 2018 filing or I would look on line 37. I need the 2018 AGI to efile my 2019.